export function addClass (el,className){
 
    if(hasClass(el, className)){
        return;
    }

    let newClass = el.className.split(' ');
    newClass.push(className);
    el.className = newClass.join(' ');
}


export function hasClass(el, className){

    let reg = new RegExp('(^|\\s)'+ className + '(\\s|$)')
    return reg.test(el.className);

}

export function getData(el, name, val){
    name = 'data-'+ name
    if(val){
        return el.setAttribute(name,val)
    }
     return el.getAttribute(name)
    
    
}